Psychologists give more than one explanation for why we like people w…

The correct answer is Option (4) → People prefer consistency, and two similar people form a consistent relationship

Option (1) Similar people make us feel recognised and give us a sense of power — Incorrect. This describes status, a reason for joining a group that others see as important. It explains why we value a prestigious group.

Option (2) Being with similar people reduces our insecurity and makes us less vulnerable to threats — Incorrect. This describes security, a reason for joining groups. Groups reduce the insecurity we feel when alone; similarity plays no part in it.

Option (3) Similar people supplement the information we lack as individuals — Incorrect. Supplementing information is a reason for joining groups. It explains what we gain from a group.

Option (4) People prefer consistency, and two similar people form a consistent relationship — Correct. People prefer consistency and like relationships that are consistent. When two people are similar, there is consistency, so they start liking each other, for example two classmates who both love football.

Note: The other explanation is that similar people reinforce and validate our opinions and values.